<PRE><B>Question 609686</B>
Glenn can paint a house in 9 hours while Stewart can paint the same house in 16 hours.
 they work together for 4 hours.
 after 4 hours Stuart left and Glenn finished the job alone.
 how many more hours did it take glen to finish the job?
:
Let t = additional time for Glenn to complete the job
Let the completed job = 1
:
{{{4/16}}} + {{{((t+4))/9}}} = 1
Reduce the fraction
{{{1/4}}} + {{{((t+4))/9}}} = 1
multiply by 36 to clear the denominators, resulting in:
9 + 4(t+4) = 36
9 + 4t + 16 = 36
4t + 25 = 36
4t = 36 - 25
t = 11/4
t = 2.75 more hrs of work for Glenn
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